US Bridges

I 29 NB over North 16th ST

Fair

Pottawattamie County, Iowa · At N Jct. of Ia 192 · Structure no. 000000000044870

Built
1967
58 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
229 ft
3 main spans
Daily traffic
11,900
2023 count
Owner
State
State Highway Agency

About this bridge

I 29 NB over North 16th ST is a steel continuous stringer/multi-beam or girder carrying I 29 NB over North 16th ST in Pottawattamie County, Iowa. It was built in 1967, so it is 58 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 11,900 vehicles a day, roughly 24% of them trucks, projected to reach 11,900 by 2043. The structure is 229 ft (69.8 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesI 29 NB
CrossesNorth 16th ST
LocationAt N Jct. of Ia 192
RouteInterstate 29
CountyPottawattamie County
StateIowa
Coordinates41.28522, -95.86766
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.2 US tons
Inventory rating23.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length229 ft (69.8 m)
Longest span86 ft (26.2 m)
Deck width43 ft (13 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,900 (2023)
Projected traffic11,900 by 2043
Trucks24%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 29 NB over North 16th ST built?

It was built in 1967, making it 58 years old in 2025.

What condition is I 29 NB over North 16th ST in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.

How much traffic does I 29 NB over North 16th ST carry?

About 11,900 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is I 29 NB over North 16th ST?

The structure is 229 ft (69.8 m) long with a longest span of 86 ft (26.2 m) and a deck 43 ft wide.

Who owns I 29 NB over North 16th ST?

It is owned by the State Highway Agency.